Duplicating machine



' June r24, 1930.-. G, P CLARK, 1,767,237

DUPLICATING MACHINE Fiied July 1o. 192s ne mi? hik f F TTORNEY Patented June 24, 1930 PATENT. yor-'Fic GERALDINE PRIN CLARK, orv'rc'roRIA, Barrrsn COLUMBIA, CANADA DUPLICATING MACHINE Application ile'd July 10,

The invention is a duplicating machine that is easily and eciently operated and particularly adaptable for small quantities of work.

The object of the invention is to provide a hand operated duplicating machine with resilient means for holding the platen a short distance above the paper when vnot printing.

Another object of the, invention is to pro-l vide a simple and inexpensive duplicatingmachine which uses any standard stencil and turns out a clear copy.

Another object of the invention is to'provide a duplicating machine in which' the platen is not lifted duringlthe operation.

Another object of the invention is to provide a duplicating machine in which the platen is readily inter-changeable without soiling the hands so that different colors may readily be used. l

Another object of the invention is to provide a duplicating machine which is of a simple and durable'construction, dilicult to put out of order, and readily repaired.

Another object of the invention is to provide a duplicating machine in whichthe paper may be squared against the laten when the platen is in the position o rest.

A further object of the invention is to provide a duplicating machine which is portable, has very little Weight and is readily carried by the handle by which it is operated.

A still further object of the invention is to'provide a duplicating machine in which the platen may be readily removed and used for printing in books or upon other surfaces that cannot be laced in the machine.

40 And a still rther object of the invention is to 'provide a duplicating machine that is of a simple and economical construction.

With these ends in view the invention em- 45 bodies a duplicating machine having a base and a curved platen adaptable to hold a stencil, and in -which the base` is provided with resiliently held strips at the ends for supporting the platen a short distance above 50 the surface thereof, with means'forholding with the 192s. serial No'. 291,556.

the platen to the base while operating and l means for holding the platen to the base when not in use.

Other features and advantages of the inventionwillappearfrom the followin def supporting the platen and showing the platen resting upon these members.

Figure 4 is a plan view of the back of the platen. g Figure 5 is a crosssection through the machine showing the parts in the same gen- 70 eral arrangement as shown in Figure 3 and parts formed by sheet metal stamp-l ings. In the drawings the device is shown as it wouldbe made, wherein numeral 1 indi- 75 cates thebase, numeral 2 the platen, and numeral 3 a piece of paper that may be placed uponthe base.

The base 1 may be made of a solid piece of material with rubber knobs 4 at the cor- '80- ners upon which it rests as shown and may be provided with a recess 5 in the center of the top in which a resilient backing as indicated by the numeral 6 is placed. It is understood however, that the pad V6 and the 85 'recess 5 may be omitted so that the paper may be placed directly upon the fiat surface at the to of the base instead of upon the pad. A jacent the ends of the base are slots 7'v in which plates 8 are Vslidably 90 mounted and the plates 8 are resiliently held upward b springs 9 in openings -10' as shown in Figure 3.' At the lower ends of the openings 10 are plates 11 which are held by screws 12, and in the centers of these plates are adjustin screws 13 which are positioned so that t ey will extend upward throughv the springs to points 14 where they will limit the downward movement of the plates 8 when the plates are forced down- 100 that the springs ward by the platen. It will be understood 9 and ,screws 13 may be arranged 'in' any suitable manner or any other suitable means may be used for resiliently holding the plates 8 in the upward position. The ends of the plates 8 are provided with projections 15 and 16 and it will be seen that the projections 15 engage the under side of. extensions .17 at the top of one end of the slots7 and the projections 16 engage plates 18 located at the opposite ends of the slots and held by providing means for limiting the upward movement of the plates 8. It will be observed that by removingthe screws 19 and the plates 18 the plates 8 may readily be removed and also that by adjustin the screws 13 the downward movement o the plates 8 may readily'be adjusted.

At the sides of the base 1 are bars 20 which are held .to the base by screws 21 and provided with notches 22 at the opposite ends which engage screws 23- on` the cover to lock the cover to the base when the device is not in use or when it is being carried. These bars may readily be released and moved downward to the position shown in Figure 1 when not in use. At the ends of the base are straps 24 through which bars 25 pass and one end of the bars is bent upward as indicated by the numeral 26 and the other end is pivotally mounted on pins 27 at the ends of the cover which is indicated by the numeral 28. These bars are so arrangedv that they will hold the cover and platen in the position of rest as shown in Figure 2 and at the same time slide through the straps to permit the platen to roll across the base when rinting. f

vIn t e desi shown in Figures 1 to 3 the cover is ma e of a Hat piece of material with recesses at the edges and pins 29 in the center which engage slots 30 in plates 31 on the back of-the platen 2. It will be observed thatthe platen may be lplaced against the cover and as it is moved toward one end the pins 29 will. be placed into the slots 30 and hold the platen to the cover. In the design shown theplaten2 is made of a solid piece of material with la groove32 in the center to clear the pins 29 and grooves 33 adjacent `the sides in which the ends of the material covering the platen are held by bars 34 and the bars 34 are held by screws 35 as shown in Figure 4. It will be observed that the edges of the platen extend beyond the shoulders of the central part of the cover which are indicated-by the numeral 36 and strips 37 are forced'.into the openings between the edges oi the platen and the upper part of the cover to hold the Athe platen rolled across screws 19, thereby A ink and the stencil is placed over the fabric so that if a sheet of paper -as indicated by the numeral 3 is placed upon the base and it a print will be placed upon the paper. The cover is provided with a handle as indicated by the numeral 38 and it will be observed that by gripping the handle and forcing the platen 'downward upon the base as it is moved across the machine the resiliently held bars 8 will move downward a suilicient distance to permit the platen to print and after the platen has been moved across the base the platen may be rolled back without being pressed downward as shown in Figure 3 so that. it will be held above the paper and therefore will not blur the print. The weight Aoi. the platen is not suiiicient to move the bars 8 downward so that the platen will only engage the paper when it is desired to make a print and at this time it should be held downward by the operator.

In the design shown in Figure 5 the metal and the platen is made of a perforated plate 39 which is held on clips 40 extending downward from the cover and the stencil is held by strips 41 which are similar to tlie strips 37. The cover and base are otherwise similar to the design shown in Figure 3 with the pad 6 held in the recesses 5 and the bars 8 resiliently held and their downward movement limited by-the screws 13.

The pad 6 and the recesses l5 ma be omitted or the pad lmay be replaced y a wood panel, and in this design the platen is shown held to the base by the bars 20.

It will be understood that other changes may be made in the construction without departing from the spirit of the invention. One of which changes may be in the use'of any other material and in the changing of and still another may be in the use of a platen of a dilferent type.

The construction will be readily under stood from the foregoing description. In use the device may'be supplied as shown and it w'ill be observed thatwith the platen in the position shown in Figure 2 a sheet of paper may be placed upon the pad 6 with the edge against the face of the platen so that the edge may readilybe squared with the platen. The platen may be provided with an ink pad and a stencil as hereinbefore described and as itis rolled across the base and held downward the stencil will engagevthe paper and print upon it;

the pa er.

It will also be observed that by removing the bars 25 from the ins 27 the platen may be removed from the ase and Vused to print upon the pages of a book or uponA a window pane or any surface that cannot be placed upon the base of a machine.

I-Iavinl thus fully described the invention,

vwhat I c aim as new and desire to secure by Letters Patent is base, a platen ada table to rock across the base, means exten ying continuously across the base for resiliently su porting the platen a short distance above t e base, and means for holding the platen in an upright position at the edge of the base.

7. In a device of the class described, a base, 'a curved platen, a cover to which the platen is removablyattached, and means extendin continuously across the base forl resilient supporting the platen a short distance a ove the base.

In testimon whereof I 'aliix my si nature. GE ALDINE PHIN CLI RK.

1. In a device of the class described, `a I base, a cover, a curved platen removably attached to the cover, means adjacent the ends of the base for resilientl right at one edge 'of the base, an ink pad on the platen, and means for holding a stencil over the said ink pad.

2. In a duplicating machine, a base, a slightly resilient 'acent the ends o the base, means for resiliently holding the bars upward, adjustable platen to the base when not in use.

' ment'of the bars, a cover havin thereon, a platen, means for holding a sten- 3. In a duplicating machine, a base, bars ad'acent the ends of the base, means for rev sihently holding the bars u ward, adjustable means for limlting the ownward movea handle cil over the platen, means for supporting the platen in an u right position at one edge of the base, an means for-holding the platen to the base when not in use.

4. In a duplicating machine, a base with a flat upper surface, transverse bars slidably mounted in vslots adjacent the endsof the base .and extending upward therefrom, springs below the bars for holding them'u ward, screws-extending upward t rought e base to points. below. the bars to limit the downward movement of Athe barsa platenl su porting the platen,- means for holding t e p aten upad on the base, bars adplaten, means for holding aten, means for support-- t los adaptable to b e'rrolled across the base and supported on the transverse bars, means on the platen for. holding4 a stencil, and means inthe platen for supp in ink to thestencil.

5. In a machine of the c aracter described, l 4

` a base, a platen adaptable to be rocked across the base, and means'extending continuously across the base for resiliently sup orting the 

